Automatic safety-stop for engines



(No Model.)

JLBATES. AUTOMATIC SAFETY STOP FORENGINES.

No. 508,671. Patented Nov. 14,1893.

27 TM n? x/vflruesslaa 'z: v dlzjft we NAn'o nnnnnnnnnnnnnnnnnnnnnnn I,NITED STATES ALBERT J. BATES, OF JOLIET, ILLINOIS.

AUTOMATIC SAFETY- STOP FOR ENGINES.

SPECIFICATION forming part of LettersPatent No. 508,671, dated November14, 1893.

Application filed May 12,1893.

the diskdesigned to be connected with the inlet valves of an enginethrough the medium of rods pivoted to said disk. Fig. 4 is a centralvertical section through the two disks and through a coil springconnecting them. Fig. 5 is a perspectiveview of the disk designed to beconnected with the governor of an engine, and Fig. 6 is a horizontalsection of the disk intended to be connected with the trippingdevice ofthe engine showing a latorally extending flange having a cam and toothand showing a sliding pin for engagingsaid cam and tooth.

This invention relates to certain improvements in an automatic safetystop for steam engines, and designed to be located between the governorand the tripping device of a four valve cylinder, and connected in Isuch manner that the governor will operate to cut off steam to thecylinder entirely, in

case of accident.

Referring to the drawings, D and K, are a pair of disks journaled onshaft S, supportedin the frame F. The two disks are connected with eachother by means of a coil spring N located in an annular recess in diskD, the outer end of said spring being connected to disk D, near itsperiphery, and its inner end" being connected to the hub of disk K. Thedisk K is intended to be connected with-a governor through the medium ofrod A, pivotally connected to said disk at H, and disk D is intended tobe connected with the tripping device of a four valve cylinder by meansof the rods B.

E is a pawl pivotally connected to disk K,

at its point of pivot with rod A, at H, and is are No. 474,016. (Nomodel.)

intended to engage a tooth O on the periphery of disk'D to oscillatesaid disk when the rod A descends and be disengaged therefrom by meansof its outwardly projecting end engaging a stop R, beneath it, when rodA descends far enough. The disk D is provided with tooth G'for engaginga stop V on frame F, for limiting the oscillation of .said disk.

Said disk D is also provided on its lower outerside with a laterallyextending tooth -W, and a cam T, shown in Figs. 3 and 6, said toothbeing for the purpose of engaging the inner end of the sliding pin P toprevent pawl E from coming in contact with stop R,when the governor isat rest. When the engine is started and the governor rod A descends, thedisk D will rotate and by means of the cam T force pin P, out, so thatthe mechanism is free to act in case of accident.

When the device is in operation and the engine is in motion the partsare in the position shown in Fig. l'as stated, the pawl E engaging toothO on disk D. In case the governor should stop on account'of any accidentto the belt or otherwise, the rod A, will descend and bring theprojecting arm of pawl E against the stop R, and thereby cause said pawlto be disengaged from tooth O on disk D, which allows disk D to berotated by means of the coil springN to such point as will restore rodsB, to the position of the earliest point of cut off, or will prevent theValves from opening, thereby stopping the engine. When stoppin g theengine, the engineer pushes in pin P, which comes in contact with toothW on disk D, and prevents such a rotation as would cause tripping. Whenthe engine is started again the disk D rotates and by means of cam T,forces pin P out so that the mechanism is means for respectivelyconnecting said disks with the tripping device and governor of a, steamengine all arranged to operate snbstam tially as and for' the purposeset forth.

2. In an automatic stop for steam engines, the combination of a diskcarrying a'pawl' and connected with the governor of the engine, a diskconnected'witll'. the trippingode vice of the engine, a coil springbetween said

